Wells – Packers or plugs – Cup type
Reexamination Certificate
2007-02-20
2007-02-20
Bagnell, David (Department: 3672)
Wells
Packers or plugs
Cup type
Reexamination Certificate
active
10842374
ABSTRACT:
An improved cup and method for making same for use on a “pig” or any other down hole equipment for engaging the wall of a pipe line, which comprises an inner metal sleeve portion; a metal shoulder portion extending outward from the sleeve around its perimeter extending into an angulated arm portion; a strong flexible material, such as polyurethane, molded onto an outer surface of the sleeve, and enveloping the metal shoulder and arm portion, the flexible material defining the outer body and cup portion of the improved cup, so that the metal shoulder and arm portion enveloped by and integral to the cup portion provides additional support to the flexible material to prevent deformation of other damage to the circular cup as it would be positioned on the “pig” body or other down hole device. The improved cup would be formed by placing the metal sleeve with the shoulder and arm member into a mold; pouring the plastic-type polyurethane material into the mold, so that upon curing, the plastic-type material adheres to an outer surface of the sleeve and completed envelopes the shoulder and arm portion of the cup; allowing the plastic-type material to cure; and removing the composite cup from the mold to be positioned onto the body of a pig or other device for use down hole.
REFERENCES:
patent: 2672199 (1954-03-01), McKenna
patent: 2691418 (1954-10-01), Connolly
patent: 4071086 (1978-01-01), Bennett
patent: 2002/0108751 (2002-08-01), Simpson
patent: 2004/0118565 (2004-06-01), Crawford
DeRoche, Jr. Terry
Harper Tom
Hutchinson David
Kirepel Larry J.
Stewart James Rick
Bagnell David
Garvey, Smith Nehrbass & North, L.L.C.
Smith Gregory C.
Stephenson Daniel P
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